Performance Bounds for Velocity Estimation with Large Antenna Arrays
arxiv(2024)
摘要
Joint communication and sensing (JCS) is envisioned as an enabler of future
6G networks. One of the key features of these networks will be the use of
extremely large aperture arrays (ELAAs) and high operating frequencies, which
will result in significant near-field propagation effects. This unique property
can be harnessed to improve sensing capabilities. In this paper, we focus on
velocity sensing, as using ELAAs allows the estimation of not just the radial
component but also the transverse component. We derive analytical performance
bounds for both velocity components, demonstrating how they are affected by the
different system parameters and geometries. These insights offer a foundational
understanding of how near-field effects play in velocity sensing differently
from the far field and from position estimate.
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